Antiskid device



' June 1 1926. 1,587,313

v s. HISANOSUKE ANTI SKID DEVICE Filed 001:; 12, 1925 INVENTOR ATTORNEYS Patented June 1, 1925.

PATENT DEE-HIE...

SATO irrsanosnir'n, or NiEWYoRK, n. Y.

ANTISKID DEVICE.

Application filed: October 12, 1925. Serial No. 62,162.

The antiski d device of the present invention is in the nature of a chain for automobile shoes.

An object of the invention is to provide a device of this character of simple, practical construction which will permit ready removal or replacement of worn tread mem bers, which will permit the ready attachment of a chain to a shoe, and which will insure against accidental loss of a chain.

Preferably the tread members are in the nature of transversely bendable, longitudinally expansible resilient members which tend to exert an outward pull on the two chains which connect them, and to offset such outward pull, 1 provide relatively strong contractile springs which connect the links of each chain at intervals.

lVith the above noted and other objects in view the invention consists in certain novel features of construction and combinations and. arrangements of parts, as will be more fully hereinafter set forth and pointed out in the claims. The invention may be more fully understood from the following description in connection with the accompanying drawings, wherein- Fig. 1 is a fragmentary view in side elevation of a vehicle wheel with my improved antiskid chain in applied position.

Fig. 2 is an enlarged transverse sectional view on the line 2-2 of Fig.- 1.

Fig. 3 is a detail view in side elevation of a modified form of tread member.

Fig. at is a view in transverse section 'on the line l--fl of Fig. 3.

Reference character 10 designates a vehicle wheel provided with the usual tire shoe 11. The anti-skid device of the present invention includes a pair of annular chains formed of alternate plates 12 and wire links 13. The cross tread members 14: are anchored at their ends in the plates. At spaced intervals about the chains, 1 provide relatively large plates 12, said plates being connected by contractile springs 15.

It will be noted that the plates 12 and 12 consist of flat metallic members having holes 12" in their ends to accommodate the hooked ends of the wire links 13, and with openings 12 near their centers in which the hooked ends 14F of the tread members 1 1 are detachably anchored. i I In the form of the invention shown in Fig. 1, the tread members i i are in the nature of: coiled contractile springs inch springs offer a very efficient tread surface, but if they are placed under any great tension, some means must be provided for counteracting their outward pull on the annularchains. Such outward pull is effectively offset by the use of the contractile springs 15., preferably larger and stronger than the tread springs 14:, and having their ends anchored in openings 12 in the plates 12. For removing the chain from a shoe, I preferably loosely connect one end. of one of the springs 15 and one of the links 13 with a plate 12 of each annular chain, whereby the links and springs may be quickly disconnected from the plate to open the annular chains and permit removal of the antiskid device. It will of course be obvious that the usual type of chain connecting devices might be utilized at any suitable point in the annular chains instead of merely detachably connecting one pair of plates 12 with their associated springs and links.

W hile I have shown the springs 15 attached to both annular chains I may elect to use them on one of the chains.

In Figures 3 and 4; I have illustrated a modified type of cross tread member which will do away with the necessity of using the contractile springs 15. This tread member indicated at 17 is also in the general nature of a coil spring, but is extremely stiff so that it normally assumes the arcuate shape shown in Fig. 3. The convolutions are flattened to provide wider tread surfaces. The spring will be slightly flexed and extended in applied position, and the convolutions will be slightly compressible as they are jammed between the vehcile and the surface over which the vehicle is rolling. The principal advantage of this type of tread over the type shown in Figures 1 and 2, is the fact that it provides a resilient action and an eflicient ground gripping surface without requiring the use of contractile springs such as 15 to relieve the chain in the links of the annular chains. In the foregoing description it will be seen that I have provided an antiskid device which may be readily removable, readily applied to a vehicle wheel, and which will permit of the ready removal and replacement of worn or broken cross treads.

While the embodiment of the invention illustrated is a preferred one, it will be evi dent that vario s changes and alter-sums be made. the general form.

rangement of parts described, without de parting from the invention. Hence I do not Wish to limit myself to the details set forth,

but shall consider myself at liberty to make 5 such changes and alterations as fairly fall within the spirit and scone of the appended claims.

I claim 1. An antiskid device including a pair of annular chains adapted to lie on opposite sides of a tire shoe, and contractile spring tread elements connecting the chains, said chains including alternate links and plates, said plates havingopenings therein into 15 which the ends of the tread elements are hooked, certain of said plates projecting inwardly beyond the others and coiled (-ontractile springs having their ends booked in openings in the inwardly projecting placa- 2. As a new element in an antiskid ch a tread member comprising a coiled contra tile spring having flattened convolutions.

3. As a new element in an an 1 chain, a tread member comprising a normally arcuate length of relatively stifl' coiled spring bendable transversely and extensible l tudinally the convolutio'ns oi said spine; being flattened to provide relatively wider tread surfaces.

SATO HISANOSUKE. 

